/**
* Internally modifies this vector by multiplying its values with a given scale value, then adding
* a given "add" value.
*
* @param scale the value to multiply this vector by.
* @param add the value to add to the result
* @return this vector for chaining
*/
public Vector4 scaleAddLocal(final double scale, final Vector4 add) {
_x = _x * scale + add.getX();
_y = _y * scale + add.getY();
_z = _z * scale + add.getZ();
_w = _w * scale + add.getW();
return this;
}
/**
* Divides the values of this vector by the given scalar value and returns the result in store.
*
* @param scalar
* @param store the vector to store the result in for return. If null, a new vector object is
* created and returned.
* @return a new vector (this.x / scalar, this.y / scalar, this.z / scalar, this.w / scalar)
*/
@Override
public Vector4 divide(final double scalar, final Vector4 store) {
Vector4 result = store;
if (result == null) {
result = new Vector4();
}
return result.set(getX() / scalar, getY() / scalar, getZ() / scalar, getW() / scalar);
}
/**
* Divides the values of this vector by the given scale values and returns the result in store.
*
* @param x
* @param y
* @param z
* @param w
* @param store the vector to store the result in for return. If null, a new vector object is
* created and returned.
* @return a new vector (this.x / scale.x, this.y / scale.y, this.z / scale.z, this.w / scale.w)
*/
@Override
public Vector4 divide(
final double x, final double y, final double z, final double w, final Vector4 store) {
Vector4 result = store;
if (result == null) {
result = new Vector4();
}
return result.set(getX() / x, getY() / y, getZ() / z, getW() / w);
}
/**
* Divides the values of this vector by the given scale values and returns the result in store.
*
* @param scale
* @param store the vector to store the result in for return. If null, a new vector object is
* created and returned.
* @return a new vector (this.x / scale.x, this.y / scale.y, this.z / scale.z, this.w / scale.w)
*/
@Override
public Vector4 divide(final ReadOnlyVector4 scale, final Vector4 store) {
Vector4 result = store;
if (result == null) {
result = new Vector4();
}
return result.set(
getX() / scale.getX(), getY() / scale.getY(), getZ() / scale.getZ(), getW() / scale.getW());
}
/**
* Multiplies the values of this vector by the given scalar value and returns the result in store.
*
* @param x
* @param y
* @param z
* @param w
* @param store the vector to store the result in for return. If null, a new vector object is
* created and returned.
* @return a new vector (this.x * scale.x, this.y * scale.y, this.z * scale.z, this.w * scale.w)
*/
@Override
public Vector4 multiply(
final double x, final double y, final double z, final double w, final Vector4 store) {
Vector4 result = store;
if (result == null) {
result = new Vector4();
}
return result.set(getX() * x, getY() * y, getZ() * z, getW() * w);
}
/**
* Subtracts the given values from those of this vector and returns them in store.
*
* @param x
* @param y
* @param z
* @param w
* @param store the vector to store the result in for return. If null, a new vector object is
* created and returned.
* @return (this.x - x, this.y - y, this.z - z, this.w - w)
*/
@Override
public Vector4 subtract(
final double x, final double y, final double z, final double w, final Vector4 store) {
Vector4 result = store;
if (result == null) {
result = new Vector4();
}
return result.set(getX() - x, getY() - y, getZ() - z, getW() - w);
}
/**
* Adds the given values to those of this vector and returns them in store.
*
* @param x
* @param y
* @param z
* @param w
* @param store the vector to store the result in for return. If null, a new vector object is
* created and returned.
* @return (this.x + x, this.y + y, this.z + z, this.w + w)
*/
@Override
public Vector4 add(
final double x, final double y, final double z, final double w, final Vector4 store) {
Vector4 result = store;
if (result == null) {
result = new Vector4();
}
return result.set(getX() + x, getY() + y, getZ() + z, getW() + w);
}
@Override
public void draw(final Renderer r) {
initialize(r);
updateTranslations();
final double camWaterDist = waterPlane.pseudoDistance(cam.getLocation());
aboveWater = camWaterDist >= 0;
if (isSupported()) {
waterShader.setUniform("tangent", tangent);
waterShader.setUniform("binormal", binormal);
waterShader.setUniform("useFadeToFogColor", useFadeToFogColor);
waterShader.setUniform("waterColor", waterColorStart);
waterShader.setUniform("waterColorEnd", waterColorEnd);
waterShader.setUniform("normalTranslation", (float) normalTranslation);
waterShader.setUniform("refractionTranslation", (float) refractionTranslation);
waterShader.setUniform("abovewater", aboveWater);
if (useProjectedShader) {
waterShader.setUniform("cameraPos", cam.getLocation());
waterShader.setUniform("waterHeight", (float) waterPlane.getConstant());
waterShader.setUniform("amplitude", (float) waterMaxAmplitude);
waterShader.setUniform("heightFalloffStart", (float) heightFalloffStart);
waterShader.setUniform("heightFalloffSpeed", (float) heightFalloffSpeed);
}
final double heightTotal = clipBias + waterMaxAmplitude - waterPlane.getConstant();
final Vector4 clipPlane = Vector4.fetchTempInstance();
if (useReflection) {
clipPlane.set(
waterPlane.getNormal().getX(),
waterPlane.getNormal().getY(),
waterPlane.getNormal().getZ(),
heightTotal);
renderReflection(clipPlane);
}
if (useRefraction && aboveWater) {
clipPlane.set(
-waterPlane.getNormal().getX(),
-waterPlane.getNormal().getY(),
-waterPlane.getNormal().getZ(),
-waterPlane.getConstant());
renderRefraction(clipPlane);
}
}
if (fallbackTextureState != null) {
fallbackTextureStateMatrix.setM31(normalTranslation);
fallbackTexture.setTextureMatrix(fallbackTextureStateMatrix);
}
super.draw(r);
}
/**
* Performs a linear interpolation between this vector and the given end vector, using the given
* scalar as a percent. iow, if changeAmnt is closer to 0, the result will be closer to the
* current value of this vector and if it is closer to 1, the result will be closer to the end
* value. The result is returned as a new vector object.
*
* @param endVec
* @param scalar
* @param store the vector to store the result in for return. If null, a new vector object is
* created and returned.
* @return a new vector as described above.
* @throws NullPointerException if endVec is null.
*/
@Override
public Vector4 lerp(final ReadOnlyVector4 endVec, final double scalar, final Vector4 store) {
Vector4 result = store;
if (result == null) {
result = new Vector4();
}
final double x = (1.0 - scalar) * getX() + scalar * endVec.getX();
final double y = (1.0 - scalar) * getY() + scalar * endVec.getY();
final double z = (1.0 - scalar) * getZ() + scalar * endVec.getZ();
final double w = (1.0 - scalar) * getW() + scalar * endVec.getW();
return result.set(x, y, z, w);
}
/**
* Scales this vector by multiplying its values with a given scale value, then adding a given
* "add" value. The result is store in the given store parameter.
*
* @param scale the value to multiply by.
* @param add the value to add
* @param store the vector to store the result in for return. If null, a new vector object is
* created and returned.
* @return the store variable
*/
@Override
public Vector4 scaleAdd(final double scale, final ReadOnlyVector4 add, final Vector4 store) {
Vector4 result = store;
if (result == null) {
result = new Vector4();
}
result.setX(_x * scale + add.getX());
result.setY(_y * scale + add.getY());
result.setZ(_z * scale + add.getZ());
result.setW(_w * scale + add.getW());
return result;
}
/**
* Creates a new unit length vector from this one by dividing by length. If the length is 0, (ie,
* if the vector is 0, 0, 0, 0) then a new vector (0, 0, 0, 0) is returned.
*
* @param store the vector to store the result in for return. If null, a new vector object is
* created and returned.
* @return a new unit vector (or 0, 0, 0, 0 if this unit is 0 length)
*/
@Override
public Vector4 normalize(final Vector4 store) {
final double lengthSq = lengthSquared();
if (Math.abs(lengthSq) > MathUtils.EPSILON) {
return multiply(MathUtils.inverseSqrt(lengthSq), store);
}
return store != null ? store.set(Vector4.ZERO) : new Vector4(Vector4.ZERO);
}
private void modifyProjectionMatrix(final Vector4 clipPlane) {
// Get the current projection matrix
projectionMatrix = cam.getProjectionMatrix().toArray(projectionMatrix);
// Get the inverse transpose of the current modelview matrix
final ReadOnlyMatrix4 modelViewMatrixInvTrans =
tRenderer.getCamera().getModelViewMatrix().invert(tmpMatrix).transposeLocal();
modelViewMatrixInvTrans.applyPre(clipPlane, clipPlane);
// Calculate the clip-space corner point opposite the clipping plane
// as (sgn(clipPlane.x), sgn(clipPlane.y), 1, 1) and
// transform it into camera space by multiplying it
// by the inverse of the projection matrix
cornerPoint.setX((sign(clipPlane.getX()) + projectionMatrix[8]) / projectionMatrix[0]);
cornerPoint.setY((sign(clipPlane.getY()) + projectionMatrix[9]) / projectionMatrix[5]);
cornerPoint.setZ(-1.0);
cornerPoint.setW((1.0 + projectionMatrix[10]) / projectionMatrix[14]);
// Calculate the scaled plane vector
final Vector4 scaledPlaneVector =
clipPlane.multiply((2.0 / clipPlane.dot(cornerPoint)), cornerPoint);
// Replace the third row of the projection matrix
projectionMatrix[2] = scaledPlaneVector.getX();
projectionMatrix[6] = scaledPlaneVector.getY();
projectionMatrix[10] = scaledPlaneVector.getZ() + 1.0;
projectionMatrix[14] = scaledPlaneVector.getW();
// Load it back into OpenGL
final Matrix4 newProjectionMatrix = tmpMatrix.fromArray(projectionMatrix);
tRenderer.getCamera().setProjectionMatrix(newProjectionMatrix);
}